McqMate
| Q. |
Purpose of an optical filter is to – |
| A. | reflect lights of different colours |
| B. | dispense light into component colours |
| C. | refract light of different colours |
| D. | transmit or absorb light of different colours |
| Answer» D. transmit or absorb light of different colours | |
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Explanation: Optical filters are devices that selectively transmit light in a particular range of wavelengths, that is, colors, while blocking the remainder. They are commonly used in photography (where some special effect filters are occasionally used as well as absorptive filters), fluorescence microscopy, spectroscopy, clinical chemistry, colour stage lighting, etc. |
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